atomtengeralattjaro wrote:OK, get this: Windows 10, open task manager, put it in fullscreen, go to performance tab, double click the graph (to turn it into compact graph mode), grab it and move it around the screen, then double click it again to bring back the "full screen" window: now it's fullscreen but isn't. Meaning you can't move it around by grabbing its top, and its fullscreen button might be outside of the screen now...They must've done so much QA on this.

In macOS if you activate Mission Control and move just slightly a window a lot of times it will become smaller and smaller until is barely a couple of pixels in the screen (good lock clicking the small window, though)